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Cheap flights from South Dakota to Idaho Falls from $349

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from South Dakota to Idaho Falls departing on 9/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from South Dakota to Idaho Falls

Cheap round-trip flights

Allegiant Air Logo
5:39 pm - 2:49 pmRAP-IDA
21h 10m1 stop
Allegiant Air Logo
8:43 pm - 2:50 pmIDA-RAP
18h 07m1 stop
$349Allegiant Air
Find Deal
Sun, Sep 14 - Thu, Sep 18
Logo
5:39 pm - 11:06 amRAP-IDA
17h 27m2 stops
Logo
8:43 pm - 2:50 pmIDA-RAP
18h 07m1 stop
$413
Find Deal
Sun, Sep 14 - Thu, Sep 18
United Airlines Logo
5:59 pm - 10:48 pmRAP-IDA
4h 49m1 stop
United Airlines Logo
4:15 pm - 9:59 pmIDA-RAP
5h 44m1 stop
$455United Airlines
Find Deal
Mon, Sep 15 - Fri, Sep 19
United Airlines Logo
5:30 am - 9:47 amRAP-IDA
4h 17m1 stop
United Airlines Logo
5:00 am - 9:06 amIDA-RAP
4h 06m1 stop
$559United Airlines
Find Deal
Mon, Sep 15 - Fri, Sep 19
United Airlines Logo
11:18 am - 5:15 pmRAP-IDA
5h 57m1 stop
United Airlines Logo
5:56 pm - 10:22 amIDA-RAP
40h 26m2 stops
$1,062United Airlines
Find Deal
Mon, Sep 15 - Fri, Sep 19
Delta Logo
6:27 am - 6:11 pmRAP-IDA
11h 44m2 stops
Delta Logo
1:06 pm - 10:30 pmIDA-RAP
9h 24m2 stops
$1,611Delta
Find Deal
Sun, Sep 14 - Thu, Sep 18

United Airlines flights from South Dakota to Idaho Falls

Our best United Airlines deals on South Dakota to Idaho Falls flight tickets
United Airlines
Sep 15
RAP5:59 pmRapid City
4h 49m
1 stop
IDA10:48 pmIdaho Falls Fanning Field
Sep 19
IDA4:15 pmIdaho Falls Fanning Field
5h 44m
1 stop
RAP9:59 pmRapid City
$455
Find similar
United Airlines
Sep 15
RAP5:30 amRapid City
4h 17m
1 stop
IDA9:47 amIdaho Falls Fanning Field
Sep 19
IDA5:00 amIdaho Falls Fanning Field
4h 06m
1 stop
RAP9:06 amRapid City
$559
Find similar
United Airlines
Sep 15
RAP11:18 amRapid City
5h 57m
1 stop
IDA5:15 pmIdaho Falls Fanning Field
Sep 19
IDA5:56 pmIdaho Falls Fanning Field
40h 26m
2 stops
RAP10:22 amRapid City
$1,062
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from South Dakota to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 14, 2025.
Use the filters below to find and compare flights from South Dakota to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Sun 9/14

5:39 pm-2:49 pm

1 stop21h 10m

Idaho Falls Fanning Field

Thu 9/18

8:43 pm-2:50 pm

1 stop18h 07m

$349

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Sun 9/14

5:39 pm-11:06 am

2 stops17h 27m

Idaho Falls Fanning Field

Thu 9/18

8:43 pm-2:50 pm

1 stop18h 07m

$413

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Mon 9/15

5:59 pm-10:48 pm

1 stop4h 49m

Idaho Falls Fanning Field

Fri 9/19

4:15 pm-9:59 pm

1 stop5h 44m

$455

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Mon 9/15

5:30 am-9:47 am

1 stop4h 17m

Idaho Falls Fanning Field

Fri 9/19

5:00 am-9:06 am

1 stop4h 06m

$559

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Mon 9/15

11:18 am-5:15 pm

1 stop5h 57m

Idaho Falls Fanning Field

Fri 9/19

5:56 pm-10:22 am

2 stops40h 26m

$1,062

Rapid CityIdaho Falls

RAP - IDA

RAPIDA

Rapid City

Sun 9/14

6:27 am-6:11 pm

2 stops11h 44m

Idaho Falls Fanning Field

Thu 9/18

1:06 pm-10:30 pm

2 stops9h 24m

$1,611

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Idaho Falls from

How to get the cheapest flight ticket from South Dakota to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Idaho Falls?

Our data shows that Thursday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $344. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Sunday is $391.

Cheap South Dakota to Idaho Falls flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from South Dakota to Idaho Falls

Best Price Found

$349

Fastest flight time

4h 17m

Direct flights

None

Airports in Idaho Falls

1 airport
The best flight deal from South Dakota to Idaho Falls found on momondo in the last 72 hours is $349
The fastest flight from South Dakota to Idaho Falls takes 4h 17m
There are no direct flights from South Dakota to Idaho Falls. Popular non-direct route for this connection is Rapid City Airport - Idaho Falls Fanning Field Airport.
There is 1 airport near Idaho Falls: Idaho Falls Fanning Field (IDA)
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  • When did momondo last update prices for flights from South Dakota to Idaho Falls Fanning Field Airport?

    Prices for flights from South Dakota to Idaho Falls Fanning Field Airport are updated daily.

  • How many operators does momondo search for flights from South Dakota to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from South Dakota to Idaho Falls Fanning Field Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from South Dakota to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The necessary travel and health documents for your Idaho Falls Fanning Field Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from South Dakota to Idaho Falls

Compare and see reviews for airlines that fly from South Dakota to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $182Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

Why use momondo?

Why should I use momondo to find a flight deal from South Dakota to Idaho Falls?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from South Dakota to Idaho Falls for you.

Can I find flights from South Dakota to Idaho Falls with flexible booking policies on momondo?

Flights from South Dakota to Idaho Falls with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from South Dakota to Idaho Falls?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Idaho Falls from South Dakota.

I’m not ready to book a flight from South Dakota to Idaho Falls right now. Can momondo alert me if prices change?

Price alerts on flights to Idaho Falls from South Dakota are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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